phphtmllib-devel Mailing List for phpHtmlLib (Page 3)

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 422-6466

Revision: 3526
          http://phphtmllib.svn.sourceforge.net/phphtmllib/?rev=3526&view=rev
Author:   hemna
Date:     2010-06-30 22:50:55 +0000 (Wed, 30 Jun 2010)

Log Message:
-----------
VFR conditions

Modified Paths:
--------------
    trunk/open2300/lib/modules/api/AviationWeather.inc

Modified: trunk/open2300/lib/modules/api/AviationWeather.inc
===================================================================

--- trunk/open2300/lib/modules/api/AviationWeather.inc	2010-06-28 23:27:13 UTC (rev 3525)
+++ trunk/open2300/lib/modules/api/AviationWeather.inc	2010-06-30 22:50:55 UTC (rev 3526)
@@ -57,7 +57,7 @@
 
 	   $cache_key = "METAR_".$icao;
 	   $info =  $this->cache->get($cache_key);
-		if ($info) {
+		if ($info && false) {
 		    $wxInfo = $info;
 			 return $wxInfo;
 		}
@@ -70,6 +70,7 @@
 			$this->process_metar($metar, $wxInfo);
 			$wxInfo["metar"] = $metar;
 
+			$this->decide_vfr($wxInfo);
 			
 			if ($airport != null) {
 				$wxInfo["runways"] = $this->get_runways($airport, $wxInfo);
@@ -392,6 +393,7 @@
 		if (strlen($part) == 1) {  // visibility is limited to a whole mile plus a fraction part
 			$integerMile = $part . ' ';
 			$metarPtr++;
+			$wxInfo["vis_distance"] = $integerMile;
 		} else if (substr($part,-2) == 'SM') {  // visibility is in miles
 			$part = substr($part,0,strlen($part)-2);
 			if (substr($part,0,1) == 'M') {
@@ -408,6 +410,8 @@
 			$wxInfo['Visibility'] = $prefix . $integerMile . $part . $unit;
 			$metarPtr++;
 			$group++;
+
+			$wxInfo["vis_distance"] = $integerMile.$part;
 			
 		} else if (substr($part,-2) == 'KM') {  // unknown (Reported by NFFN in Fiji)
 			$metarPtr++;
@@ -421,6 +425,8 @@
 			$wxInfo['Visibility'] = $distance . $unit;
 			$metarPtr++;
 			$group++;
+
+			$wxInfo["vis_distance"] = $distance;
 			
 		} else if ($part == 'CAVOK') {  // good weather
 			$wxInfo['Visibility'] = 'greater than 7 miles';  // or 10 km
@@ -428,6 +434,9 @@
 			$wxInfo['Clouds'] = 'clear skies';
 			$metarPtr++;
 			$group += 4;  // can skip the next 3 groups
+
+			//just need to mark this as > 5
+			$wxInfo["vis_distance"] = 10;
 			
 		} else {
 			$group++;
@@ -525,6 +534,7 @@
 		'VV'  => 'vertical visibility');
 		if ($part == 'SKC' || $part == 'CLR') {
 			$wxInfo['Clouds'] = $cloudCode[$part];
+			$this->add_cloud_entry($part, $cloudCode[$part], "", $wxInfo);
 			$metarPtr++;
 			$group++;
 		}
@@ -535,6 +545,11 @@
 					$altitude = (integer) 100 * $pieces[2];  // units are feet
 					$wxInfo['Clouds'] .= " at $altitude ft";
 //				}
+				$code = substr($part,0,2);
+				if ($code != "VV") {
+					$code = substr($part,0,3);
+				}
+				$this->add_cloud_entry($code, $clodeCode[$part], $altitude, $wxInfo);
 				$metarPtr++;
 			}
 			else {
@@ -542,6 +557,20 @@
 			}
 		}
 	}
+
+	private function add_cloud_entry($code, $human, $altitude, &$wxInfo) {
+			$newEntry =  array("code" => $code, "human" => $human, "altitude" => $altitude);
+			$wxInfo['CloudArr'][] = $newEntry;
+			if (!empty($altitude) && !isset($wxInfo['lowestClouds'])) {
+				$wxInfo['lowestClouds'] = $newEntry;
+			} else if (!empty($altitude)) {
+				if ($wxInfo['lowestClouds']['altitude'] > $altitude) {
+					$wxInfo['lowestClouds'] = $newEntry;
+				}
+			}
+	}
+
+
 	protected function get_heat_index($tempF, $rh, &$wxInfo) {
 			// Calculate Heat Index based on temperature in F and relative humidity (65 = 65%)
 			if ($tempF > 79 && $rh > 39) {
@@ -835,9 +864,8 @@
 		$densalt = $densaltzm*$ft_per_m;
 
 		if ( $densalt > 36090 || $densalt < -15000 )	{
-			
-			var_dump ("Out of range for Troposhere Algorithm: Altitude =" . round($densalt,0) . " feet" );
-			return;
+		   Log::singleton()->err("AviationWeather::density_altitude($altitude, $Pmb, $PinHg, $tempC, $dewC)  --  Out of range for Troposhere Algorithm: Altitude =" . round($densalt,0) . " feet" );
+			return null;
 		}
 		
 		return round($densalt,0);
@@ -950,6 +978,64 @@
 			}
 			return false;
 	}
+
+
+
+	/**
+	 * decide what meteorological conditions 
+	 * the airport is in.
+	 *
+	 * @see http://aviationweather.gov/adds/metars/description_ifr.php
+	 */
+	function decide_vfr($wxInfo) {
+		//first lets try the easy approach.
+		//if we have > 5 miles visibility
+		if ($wxInfo["vis_distance"] >= 5) {
+			//clouds need to be > 3000 AGL
+			if ($wxInfo["lowestClouds"]["altitude"] >= 3000 ||
+				( $wxInfo["lowestClouds"]["altitude"] < 3000 &&
+				  ($wxInfo["lowestClouds"]["code"] == "CLR" ||
+				   $wxInfo["lowestClouds"]["code"] == "SKC" ||
+				   $wxInfo["lowestClouds"]["code"] == "FEW" ||
+				   $wxInfo["lowestClouds"]["code"] == "SCT"))
+			   ) {
+				$wxInfo["SkyConditions"] = "VFR";
+			} else {
+				$wxInfo["SkyConditions"] = "MVFR";
+			}
+
+		} else if ($wxInfo["vis_distance"] >=3) {
+			//clounds between 1000' and 3000'
+			if ($wxInfo["lowestClouds"]["altitude"] >= 1000 ||
+				( $wxInfo["lowestClouds"]["altitude"] < 1000 && 
+				  ( $wxInfo["lowestClouds"]["code"] == "CLR" ||
+				    $wxInfo["lowestClouds"]["code"] == "SKC" ||
+				    $wxInfo["lowestClouds"]["code"] == "FEW" ||
+				    $wxInfo["lowestClouds"]["code"] == "SCT"))
+				  ) {
+				$wxInfo["SkyConditions"] = "MVFR";
+			} else {
+				$wxInfo["SkyConditions"] = "IFR";
+			}
+
+		} else if ($wxInfo["vis_distance"] >=1) {
+		    //clouds between 500' and 1000'	
+			if ($wxInfo["lowestCloudes"]["altitude"] >= 500) {
+				$wxInfo["SkyConditions"] = "IFR";
+			} else {
+				$wxInfo["SkyConditions"] = "LIFR";
+            }
+
+
+		} else if ($wxInfo["vis_distance"] <1) {
+			//clouds < 500'
+			if ($wxInfo["lowestCloudes"]["altitude"] < 500) {
+				$wxInfo["SkyConditions"] = "LIFR";
+			} else {
+				$wxInfo["SkyConditions"] = "IFR";
+            }
+		}
+	}
 					
 }
 


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.




2002	Jan	Feb	Mar	Apr	May	Jun (33)	Jul (2)	Aug (3)	Sep	Oct (2)	Nov (1)	Dec
2003	Jan	Feb	Mar (4)	Apr	May (3)	Jun (1)	Jul (10)	Aug (5)	Sep	Oct	Nov (2)	Dec (5)
2004	Jan (1)	Feb (8)	Mar (139)	Apr (65)	May (32)	Jun (55)	Jul (21)	Aug (60)	Sep (43)	Oct (1)	Nov (18)	Dec (34)
2005	Jan (25)	Feb (2)	Mar (49)	Apr (13)	May (40)	Jun (22)	Jul (21)	Aug (59)	Sep (178)	Oct (54)	Nov (3)	Dec (49)
2006	Jan (21)	Feb (1)	Mar (5)	Apr (29)	May (86)	Jun (79)	Jul (52)	Aug (127)	Sep (187)	Oct (90)	Nov (61)	Dec (48)
2007	Jan (79)	Feb (136)	Mar (58)	Apr (139)	May (293)	Jun (112)	Jul (138)	Aug (112)	Sep (148)	Oct (76)	Nov (29)	Dec (66)
2008	Jan (45)	Feb (60)	Mar (119)	Apr (169)	May (172)	Jun (136)	Jul (107)	Aug (114)	Sep (104)	Oct (26)	Nov (50)	Dec (48)
2009	Jan (9)	Feb (35)	Mar (22)	Apr (43)	May (83)	Jun (68)	Jul (58)	Aug (21)	Sep (23)	Oct (62)	Nov (36)	Dec (26)
2010	Jan (16)	Feb (83)	Mar (73)	Apr (51)	May (76)	Jun (96)	Jul (70)	Aug (33)	Sep (10)	Oct (1)	Nov (2)	Dec
2011	Jan (4)	Feb (1)	Mar	Apr (1)	May	Jun (1)	Jul	Aug	Sep (2)	Oct	Nov	Dec
2012	Jan	Feb (1)	Mar (12)	Apr	May (1)	Jun (2)	Jul	Aug (3)	Sep (3)	Oct	Nov	Dec
2013	Jan	Feb (3)	Mar	Apr (1)	May	Jun (1)	Jul (1)	Aug	Sep (5)	Oct (1)	Nov	Dec (1)
2014	Jan (2)	Feb (1)	Mar	Apr (2)	May (1)	Jun	Jul (1)	Aug (2)	Sep (2)	Oct (2)	Nov (3)	Dec
2015	Jan (1)	Feb (1)	Mar (2)	Apr (1)	May (2)	Jun (2)	Jul	Aug (1)	Sep (1)	Oct	Nov	Dec
2016	Jan	Feb	Mar	Apr	May (1)	Jun	Jul (1)	Aug (1)	Sep	Oct (1)	Nov	Dec
2017	Jan	Feb	Mar (1)	Apr	May	Jun	Jul (1)	Aug	Sep	Oct	Nov	Dec

phphtmllib-devel Mailing List for phpHtmlLib (Page 3)

phphtmllib-devel — phpHtmllib devel mailing list